CN1478258A - Optical method and device for inspecting documents - Google Patents
Optical method and device for inspecting documents Download PDFInfo
- Publication number
- CN1478258A CN1478258A CNA018197426A CN01819742A CN1478258A CN 1478258 A CN1478258 A CN 1478258A CN A018197426 A CNA018197426 A CN A018197426A CN 01819742 A CN01819742 A CN 01819742A CN 1478258 A CN1478258 A CN 1478258A
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- China
- Prior art keywords
- file
- arbitrary
- detector
- light source
- array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 21
- 230000003287 optical effect Effects 0.000 title description 3
- 238000005286 illumination Methods 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/121—Apparatus characterised by sensor details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4735—Solid samples, e.g. paper, glass
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Image Input (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Character Input (AREA)
- Holo Graphy (AREA)
Abstract
Document inspection apparatus comprises a document transport system (1) for transporting documents through a detector station (6). A linear array of separately activatable light sources (14, 15) at the detector (12) receives light transmitted through or reflected by any of the illuminated portions of the document and generates a corresponding output signal. A control system (9) sequentially activates the light sources and monitors the output signals from the detector.
Description
The present invention relates to be used to obtain file (document) for example as the method and apparatus of the information of this class value documents of banknote (banknote).
Document handling apparatus all comprises several detectors as banknote counter, sorter and divider, is used for check banknote when banknote is transmitted through these devices, to determine certain specific character such as the authenticity and the denomination of banknote.For example, common one or more in reflection, fluorescence and the transmissison characteristic of checking file with the optical illumination outside visible range or the visible range time.Synthetic detection light is used to produce the image that file is scanned part, and this image is compared with the image of pre-stored to determine its denomination or other characteristic then.Yet these detection systems are very expensive and very complicated, need to use a lot of light source and detector.
A kind of example that is used for surveying the device that printing ink exists on the file is described in EP314312A.In this case, one led array produces the radiation beam of different wave length, these radiation beams are modulated in different separately modes, make it possible to utilize single detector to respond all wavelength, and can extract the information of (extract) each illumination wavelength from this single detector.In general, the modulation of these illumination wavelength will make banknote in identical position simultaneously by a more than wavelength illumination.
According to a first aspect of the present invention, a kind of method that is used to obtain fileinfo comprises along a transfer path and transmits described file; Subsequently along the route that is transverse to described direction of transfer several parts with the described file of rayed with same wave length; And use a shared detector to survey the light that has seen through described file or reflected by described file, to determine of the response of each different piece of described file to described irradiation.
According to a second aspect of the present invention, device for verifying documents comprises a file transfer system, is used for transmitting file and passes a monitor station; One is in the linear array of the light source that can start separately on the described monitor station, is used for appropriate section with the described file of rayed with identical wavelength; One shared detector is used for receiving through the arbitrary illuminated part of this document or by the light of its reflection, and produces corresponding output signal; And a control system, be used for described light source of sequence starting and monitoring output signal from described detector.
We have worked out a kind of simpler method and device, and it utilizes a shared detector to receive irradiation from a series of parts of file.By the sequential illumination various piece, no longer need to have independent detector corresponding to each part, this is because know all that in arbitrary concrete moment which part of file is just illuminated, and the response of detector can corresponding therewith part correlation connection.
In general, this common detector will comprise photodiode such as strip light electric diode.The example of this class photodiode is described among the US5309515A, wherein describes a detector system, and it does not determine the position of document edge as yet through the light of file by monitoring.
Illumination wavelength generally is positioned at outside the visible-range, for example in infra-red range, but also can be in visible-range.In addition, in some cases, utilizing different colors or wavelength to shine different piece also is of great use, to characterize the different characteristic of file.Therefore, the some parts of file can be with the rayed of visible-range, and remainder can be with shining outside the visible-range, thereby just can realize this method respectively in each part, and second kind of enforcement of this device is provided.
In general, along with the transmission of file, more than one group of part of this document is illuminated, to construct the image of partial document at least.For example, the image of signature (for example on the bank book) or photo or security feature on the file.In addition, this image can for example be the profile of this document simply, is determined with the marginal position that can make file.
These parts can extend to the edge of file or pass the central area of file.And, extra partial array (arrays of portions) also can be illuminated, each array all is associated with its own shared detector, and can organize (organize) many groups in some cases so that the whole document width of crosscut direction of transfer is all illuminated.
In general, light source comprises light emitting diode, but the light source of other type also is available as laser diode.
This detector or each detector generally comprise a photodiode.
When without any file, can come the intensity and/or the threshold of detectability of each independent light source are calibrated by scanning these light sources, to consider the gathering (dirt build up) and the irregular specification of equipment (device specification) of dirt.
Should be appreciated that from top narration the present invention produces a kind of detector of relatively low cost, it can scan and have a less size than the time of Conventional detectors cost less.This is that pixel resolution is lower because survey for size, scans thereby exist less LED, therefore finishes single pass with regard to spending the less time.Come to obtain absolute resolution by interpolation method (interpolation) with software (in software).Thereby the picture of the figure that is provided has the resolution lower than existing apparatus.
As mentioned above, the present invention can be used in the document handling apparatus of number of different types, comprises classified document counter, sorter, divider, recirculator, validator (validator) and receiver (all these devices all have long and short Edge feed).The present invention is especially relevant as the processing of traveller's check with other value documents with banknote, but also can use together with other file type that comprises elongate web (web).
Now with reference to accompanying drawing description some examples, wherein according to method and apparatus of the present invention
Fig. 1 is the schematic side elevation of a document handling apparatus example part, wherein is provided with this detector;
Fig. 2 is the cross section along Fig. 1 center line Y-Y;
Fig. 3 is the side view of second example part;
Fig. 4 is the cross section along Fig. 3 center line X-X;
Fig. 5 is the block diagram of main processing element;
Fig. 6 is similar to Fig. 1 but the view of the 3rd example.
Device shown in Figure 1 comprises that one is installed in the travelling belt 1 between the side plate 1 ' (only representing), and this travelling belt 1 comprises that one is entrained in roller 3,4 friction feed band 2 on every side.Roller 3,4 rotates in the control lower edge of the motor (not shown) direction of arrow, and cooperates with hold-down roller 3 ', 4 ' and the banknote of presenting from a source (not shown) 5 to be fed be with 2 to carry and pass monitor station 6.
The formation of this monitor station 6 is illustrated among Fig. 2 in more detail.Thereby this detector comprises the light emitting diode (LED) 12 of linear array.Wherein each light emitting diode all is coupling on the driver, and this driver receives the control signal from a microprocessor 9.As shown in Figure 2, led array 12 is positioned at banknote 5 and is transmitted on the position of passing monitor station 6.
A pair of strip light electric diode 14,15 is arranged under the array 12 and with array 12 to be aimed at.Each strip light electric diode 14,15 all has one along the single sense zone that its whole length is extended, thereby lateral resolution can not be provided individually.
In the front of strip light electric diode 14,15 a light filter (not shown) can be set, so that arrive the light that the light of photodiode only limits to be detected.
Control circuit is illustrated among Fig. 5, and as can be seen, microprocessor 9 is coupling on led array 12 and the strip light electric diode 14,15.This microprocessor 9 is connected on the storer 16 simultaneously.This microprocessor 9 is suitable for generation to control the output signal of banknote subsequent treatment.According to the equipment that this device is set therein, the effect of these control signals can change.This can comprise that stopping to transmit, control commutator is fed to certain location or output storage (pocket) etc. with banknote.
The structure of these LED and control are similar to described in the US5309515A, and the document is bonded to that this is for referencial use.
In use, banknote 5 is passed through monitor station 6 by 1 transmission of friction feed band system.Along with banknote passes monitor station 6, microprocessor 9 sends control signal to led driver, and the LED in the array 12 is illuminated successively.In general, these LED are illuminated in couples, and each LED of every centering is corresponding to different strip light electric diode 14,15.Say that typically these LED are illuminated (the banknote feed rate is about 4m/s) with the speed in every LED 50-60 microsecond scope.The electric current of LED is controlled to provide uniform illumination, and this processing is based on previous calibration.This photodiode signal can come by further normalization by a kind of processing based on more accurate calibration.Each LED produces the infrared beam with identical wavelength, this infrared beam directly or a part of passing banknote 5 reach corresponding strip light electric diode 14,15.
In this example, all LED in the array 12 produce the infrared beam of identical wavelength.Yet array 12 can be divided into two or more subarrays, and all LED in each subarray produce identical wavelength, but the wavelength between each array is different.
The signal intensity that microprocessor 9 monitoring is received by the photodiode 14,15 corresponding to each LED in the array 12, and will be stored in the storer 16 in the total intensity of position separately.Because the sequential illumination of LED, so can obtain lateral resolution.Also promptly, only there are two LED to illuminate at any one time.
This led array 12 is activated (activate) at least once, so that obtain bidimensional partial array or pel array (banknote is further transmitted) along each edge of file between the sample interval.
Then, microprocessor 9 determines corresponding to the pixel of a file part with corresponding to the pixel of the LED of overlay file not, and ignores the latter " pixel " by giving up pixel that intensity surpasses threshold value.
Then, further handle remaining data in a conventional manner, and compare with one or more main graphic data set that is stored in the storer 16, remaining data wherein determines to pass the received infrared light intensity of file.Adopt arbitrary traditional figure comparison or recognition technology just can realize this comparison.In this manner, the denomination of banknote 5 and/or authenticity just can be determined.In simple the application, can comprise one or more size and the predetermined value of file are made comparisons.In the example of more complicated, the figure on the file or image and predetermined figure or image can be made comparisons.
After determining this one side of file, then, microprocessor 9 just provides operation that output realizes (effect) document conveying arrangement, for example mechanical positioning, threshold value etc. is set, to influence the performance of in document conveying apparatus and/or communication component or indicating device (perhaps at document conveying apparatus inner or in the document conveying apparatus outside) other detector or sensor based on the standard of determining.
Fig. 3 and 4 explanations are with the alternative structure as monitor station 6 of 6 ' expression.This monitor station 6 ' has a pair of driven voller 20, and this forms roll gap to driven voller 20 with the respective rollers 21,22 around its circumference spaced position place.Banknote 5 enters by the roll gap that is limited by roller 20 and 21, and is introduced in the roll gap of 20,22 qualifications of roller.One group of three led array 12A-12C is provided with over against single strip light electric diode 14.
The control system that is used for Fig. 3 example is similar to shown in Fig. 5, except that microprocessor 9 connects each led array 12A, 12B, the 12C separately.In the work, illuminate the LED (i.e. three LED) in three arrays at every turn.As previously mentioned, these LED are that order illuminates.
In other example (not shown), a more than strip light electric diode can interrelate with single led array.But it is important that a strip light electric diode is only illuminated by single led at any one time.
And these examples are surveyed the infrared light of transmission.Other alternate example can be surveyed infrared (or other wavelength) light of reflection, perhaps not only surveys transmitted infrared light but also survey reflects infrared light by in file path both sides the strip light electric diode being set.Therefore, Fig. 6 represents the example that an infrared radiation that wherein reflects is detected." identical with Fig. 1 is except that strip light electric diode 14,15 is installed in the transmission side identical with led array 12 for Gou Zao monitor station 6 in this example.In addition, light filter 20 is arranged on the front of photodiode 14,15.
Claims (21)
1. method of obtaining fileinfo, this method comprise along a transfer path and transmit described file; Subsequently along the route that is transverse to described direction of transfer several parts with the described file of rayed with same wave length; And use a shared detector to survey the light that has seen through described file or reflected by described file, to determine of the response of each different piece of described file to described irradiation.
2. according to the process of claim 1 wherein that described illumination wavelength is positioned at outside the visible-range.
3. according to the method for claim 2, wherein said illumination wavelength is positioned at infra-red range.
4. according to the method for aforementioned arbitrary claim, wherein one group of several part are utilized and are different from another wavelength of organizing several parts and shine.
5. according to the method for aforementioned arbitrary claim, also comprise described response is stored in the storer.
6. according to the method for aforementioned arbitrary claim, also comprise and repeat described irradiation and detection steps, to determine the response of more than an array part.
7. according to the method for aforementioned arbitrary claim, wherein said part extends to the edge of described file.
8. according to method arbitrary in the claim 1 to 6, wherein said part extends through the central area of described file.
9. according to method arbitrary in the claim 1 to 6, wherein said part extends across the whole dimension of the described direction of transfer of described file crosscut.
10. according to the method for aforementioned arbitrary claim, wherein said part is along the route extension of vertical described direction of transfer substantially.
11. a method of handling file comprises the information of utilizing method arbitrary in the claim 1 to 10 to obtain each file; With information of obtaining and the information of being scheduled to relatively; And handle described file according to result relatively subsequently.
12. handle the method for value documents as banknote according to claim 11, wherein said comparison step is determined the value of described file and authenticity one of them or both.
13. device for verifying documents comprises a file transfer system, is used for transmitting file and passes a monitor station; One is in the linear array of the light source that can start separately on the described monitor station, is used for appropriate section with the described file of rayed with identical wavelength; One shared detector is used for receiving through the arbitrary illuminated part of this document or by the light of its reflection, and produces corresponding output signal; And a control system, be used for described light source of sequence starting and monitoring output signal from described detector.
14. device according to claim 13, also comprise the linear array that is in one or more the other light source that can start separately on the described monitor station, be used for the appropriate section of shot file, each array all with this array shared each detector cooperate, be used for receiving see through by the arbitrary part of this array institute's shot file or by the light of its reflection.
15. according to the device of claim 13 or 14, wherein said light source comprises light emitting diode.
16. according to device arbitrary in the claim 13 to 15, wherein said detector or each detector all comprise a photodiode.
17. according to device arbitrary in the claim 13 to 16, wherein said light source produces the wavelength outside the visible-range.
18. according to the device of claim 17, wherein said light source produces the wavelength in the infra-red range.
19. according to device arbitrary in the claim 13 to 18, wherein one group of several described light source produces irradiation to be different from another wavelength of organizing several light sources.
20. document handling apparatus comprises according to device for verifying documents arbitrary in the claim 13 to 19; One storer, be used for storing the tentation data relevant with described file, wherein said control system is suitable for the output signal from described detector or each detector is compared with the data of pre-stored in the described storer, and sends the suitable control signal of determining that described file is further handled.
21. according to the device of claim 20, wherein said tentation data is relevant with the value and the authenticity of value documents.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0029157.5A GB0029157D0 (en) | 2000-11-29 | 2000-11-29 | Method and apparatus for obtaining information about documents |
| GB0029157.5 | 2000-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1478258A true CN1478258A (en) | 2004-02-25 |
Family
ID=9904144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018197426A Pending CN1478258A (en) | 2000-11-29 | 2001-11-21 | Optical method and device for inspecting documents |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US20040021850A1 (en) |
| EP (1) | EP1337977B1 (en) |
| CN (1) | CN1478258A (en) |
| AT (1) | ATE393940T1 (en) |
| AU (1) | AU2002223083A1 (en) |
| CY (1) | CY1108206T1 (en) |
| DE (1) | DE60133832T2 (en) |
| ES (1) | ES2306742T3 (en) |
| GB (1) | GB0029157D0 (en) |
| PT (1) | PT1337977E (en) |
| WO (1) | WO2002045033A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542657A (en) * | 2010-12-31 | 2012-07-04 | 北京兆维电子(集团)有限责任公司 | Laser fake-identifying device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2453229A1 (en) * | 2003-12-12 | 2005-06-12 | Cashcode Company Inc. | Reflective optical sensor for bill validator |
| US7900630B2 (en) * | 2005-06-17 | 2011-03-08 | Nellcor Puritan Bennett Llc | Gas delivery mask with flexible bellows |
| CN101238365A (en) * | 2005-08-10 | 2008-08-06 | 德拉鲁国际有限公司 | Ultrasonic document inspection system |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204765A (en) * | 1977-12-07 | 1980-05-27 | Ardac, Inc. | Apparatus for testing colored securities |
| US4587434A (en) * | 1981-10-22 | 1986-05-06 | Cubic Western Data | Currency note validator |
| US4672219A (en) * | 1984-06-28 | 1987-06-09 | Oki Electric Industry Co., Ltd. | Image reader with scanning by array of sequentially illuminated light sources |
| GB8725034D0 (en) * | 1987-10-26 | 1987-12-02 | De La Rue Syst | Detecting inks |
| US4988153A (en) * | 1989-12-22 | 1991-01-29 | Bell Communications Research, Inc. | Holographic memory read by a laser array |
| US5870487A (en) * | 1990-02-05 | 1999-02-09 | Cummins-Allison Corp. | Method and apparatus for discriminting and counting documents |
| AU1680892A (en) * | 1991-03-27 | 1992-11-02 | Brandt Inc. | Currency note width detector |
| ES2103330T3 (en) * | 1991-10-14 | 1997-09-16 | Mars Inc | DEVICE FOR OPTICAL RECOGNITION OF DOCUMENTS. |
| IT1250847B (en) * | 1991-10-15 | 1995-04-21 | Urmet Spa | BANKNOTE VALIDATION APPARATUS |
| GB9424971D0 (en) * | 1994-12-10 | 1995-02-08 | At & T Global Inf Solution | Document authentication system |
| DE19517194A1 (en) * | 1995-05-11 | 1996-11-14 | Giesecke & Devrient Gmbh | Device and method for checking sheet material, e.g. Banknotes or securities |
| US6661910B2 (en) * | 1997-04-14 | 2003-12-09 | Cummins-Allison Corp. | Network for transporting and processing images in real time |
| US6573983B1 (en) * | 1996-11-15 | 2003-06-03 | Diebold, Incorporated | Apparatus and method for processing bank notes and other documents in an automated banking machine |
| US6731785B1 (en) * | 1999-07-26 | 2004-05-04 | Cummins-Allison Corp. | Currency handling system employing an infrared authenticating system |
-
2000
- 2000-11-29 GB GBGB0029157.5A patent/GB0029157D0/en not_active Ceased
-
2001
- 2001-11-21 EP EP01998943A patent/EP1337977B1/en not_active Expired - Lifetime
- 2001-11-21 AU AU2002223083A patent/AU2002223083A1/en not_active Abandoned
- 2001-11-21 WO PCT/GB2001/005143 patent/WO2002045033A1/en active IP Right Grant
- 2001-11-21 PT PT01998943T patent/PT1337977E/en unknown
- 2001-11-21 US US10/415,669 patent/US20040021850A1/en not_active Abandoned
- 2001-11-21 ES ES01998943T patent/ES2306742T3/en not_active Expired - Lifetime
- 2001-11-21 DE DE60133832T patent/DE60133832T2/en not_active Expired - Lifetime
- 2001-11-21 CN CNA018197426A patent/CN1478258A/en active Pending
- 2001-11-21 AT AT01998943T patent/ATE393940T1/en not_active IP Right Cessation
-
2008
- 2008-07-21 CY CY20081100758T patent/CY1108206T1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542657A (en) * | 2010-12-31 | 2012-07-04 | 北京兆维电子(集团)有限责任公司 | Laser fake-identifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1337977B1 (en) | 2008-04-30 |
| ES2306742T3 (en) | 2008-11-16 |
| AU2002223083A1 (en) | 2002-06-11 |
| DE60133832T2 (en) | 2009-05-20 |
| EP1337977A1 (en) | 2003-08-27 |
| ATE393940T1 (en) | 2008-05-15 |
| WO2002045033A1 (en) | 2002-06-06 |
| DE60133832D1 (en) | 2008-06-12 |
| PT1337977E (en) | 2008-05-23 |
| US20040021850A1 (en) | 2004-02-05 |
| GB0029157D0 (en) | 2001-01-17 |
| CY1108206T1 (en) | 2014-02-12 |
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